Web winding apparatus



Jan. 7, 1964 E. D. NQYSYTRAND WEB 'WINDING APPARATUS 5 Sheets-Sheet 1Filed Aug. 1. 1961 Jan. 7, 1964 E. D. NYSTRAND WEB WINDING APPARATUS 5Sheets-Sheet 2 Filed Aug. 1. 1961 ATTORNEYS.

.Jan. 7, 1964 E. D. NYSTRAND WEB WINDING APPARATUS Filed Aug. 1, 1961 5Sheets-Sheet 3 /N V! N 703,.

I I EP/YsZQ/WJI/MNP BYM %W 44/ Jan. 7, 1964 E. D. NYSTRAND 3,116,890

WEB WINDING APPARATUS Filed Aug. 1, 1961 5 Sheets-Sheet 1.

By m www ATTORNEYS.

1964 E. D. NYSTRAND 3,116,890

WEB WINDING APPARATUS Filed Aug. 1. 1961 5 Sheets$heet 5 gig 52 Cl/VVENTO/Z.

United States Patent 3,1165% it? WENDENG APPARATUS Ernst l). Nystranc,Green Bay, Wis, assignor to Paper Qonverting Machine Gm, line, GreenBay, Win, a corporation oi Wisconsin Aug. l, 1961, gt!!- No. 128,434 isClaims. pi. 242-54 This invention relates to a Web winding apparatusand, more particularly, to a rewinder in which a web such as paper isrewound from a large roll into a number of smaller rolls.

The invention described herein can be used with a multiple stage winderof the character described in Kwitek and ystrand U.S. Patent No.2,769,600, and reference is hereby made to that patent.

This application is a continuation-in-part of my copending application,Serial No. 724,358, filed March 27, 1958, now Patent No. 2,995,314.

Multiple stage rewinders of the character described in theabove-mentioned patent and with which this invention has to do, are usedin large numbers in the paperproducing industry, Paper coming from apaper-making machine is most conveniently stored in large rolls,sometimes five feet in diameter or more. Before the paper can bemarketed to the ultimate consumer, as would particularly be the case intoilet tissue, toweling, etc., it is necessary to provide much smallerrolls. To make the unrolling and rerolling as economical as possible,high speed rewind rs have been developed. These machines take the paperas it is unwound at a constant rate of speed and slit it into narrowerwidths and rewind the narrower widths continuously on small paperboardcores. When it is considered that the paper is traveling at speeds oftenwell in excess of 1009 feet per minute, it will be appreciated that alarge number of problems arise in rewinding.

Prominent among the many problems present is that of regulating therotational speed of the rewinder element or mandrel on which the paperis to be rewound. This could be avoided if the mandrel on which a web isrewound could be driven independently of the tension in the web, and theprovision of such an apparatus constituted an important object of myearlier application.

Another object of the instant invention is to provide an improvedversion of the apparatus disclosed in the earlier applicationapparatuswhich is particularly improved relative to operations other than normalrewinding.

For example, in threading the winder (interchangeably termed rewinder),it is most desirable to limit the amount of paper waster. The first logor batch of wound rolls (if the paper web is slit on the rewinder) mustbe discarded. These represent loss of paper and take up space wherespace may be ill aiforded. Also, this is a crucial time in winderoperation and the more scrap paper to be handled, the more the operatormust be concerned with unproductive functions which could take hisattention away from the machine.

The provision of significantly less paper in the initial winding isachieved through the instant invention and the provision of a novelmechanism for this constitutes a more specific object of this invention.

More generally, the invention has as its object the provision of novelmechanism for regulating portions of the rewinder during indexing of themandrels other than during normal high speed continuous rewinding. Assuch, it permits power indexing of the mandrels when the main portion ofthe rewinder is inoperative. This has been found advantageous in thenormal day-to-day commercial operation.

it should be pointed out that rewinders justify themselves economicallybecause of the high output resulting from high speed, continuousoperation. Anything that 3,ll6,8% Patented Jan. 7, 1%84 avoids extendeddown-time is especially desirable. This can be appreciated from the factthat as little as a few years ago, rewinders were normally operating atabout 700 f.p.m., while now they are approaching 2000 f.p.m., and evenhigher speeds are contemplated. This has meant more complex machineswith potential increase in troubles-troubles minimizable by the instantinvention.

Other objects and advantages, both general and specific, may be seen inthe details of construction and operation seen as this specificationproceeds.

This invention will be explained, in an illustrative embodiment, inconjunction with the accompanying drawing, in which- FIG. 1 is a sideelevational view of a winder which is equipped with a variable speeddrive embodying teachings of this invention; FIG. 2 is an enlargedfragmentary view of the portion of the drive seen in the lowerright-hand portion of FIG. 1; FIG. 3 is an enlarged fragmentarysectional view, taken along the line 33 of FIG. 1; FIG. 4 is an enlargedfragmentary plan view as would be seen along the line 4-4 of FIG. 1;FIG. 5 is an enlarged fragmentary cross-sectional view of one of themandrels with which the rewinder is equipped; FIG. 6 is a view similarto FIG. 5 but showing a different mandrel arrangement; FIGS. 7 and 8 arewiring diagrams for the rewinder; and FIG. 9 is an air piping diagram.

In the illustration given, a web winding apparatus (commonly referred toas a rewinder) is designated generally by the numeral ill. Rewinder inincludes a frame 11, on which is rotatably carried a multiple mandrelturret generally designated by the numeral 12. The frame ll alsoprovides a rotatable mounting for bedroll 13, over which a web 14travels on its way to being wound on mandrels 15.

In the illustration given, the turret 12 is provided with six webwinding mandrels 15. One web winding mandrel, designated by the numeral15a, is shown in a web winding station. The mandrel designated 15b isshown in a roll-removing station; that designated 15c in acore-receiving station; that designated 15d in a core-cutting station;that designated 15:: in a glue-applying station; and that designated 15in a station at which the mandrel has been brought up to the properrotational speed at which the web winding operation on that particularmandrel is ready to begin. The turret 12 as illustrated is equipped withsix mandrels, and such is considered an optimum number. However, agreater or lesser number may be satisfactorily employed in the practiceof this invention, provided, however, that an even number are employed.

To initiate a rewinding on a particular mandrel, for example, mandrel 15in the illustration given, the turret 12 is rotated counterclockwise andmandrel 15f is brought near to bedroll 13 which feeds the leading edgeportions of the web against the core with which mandrel i5 is equipped.During the course of winding the web on a given mandrel, the turret isrotated further so as to position the mandrel at the end of a particularwinding operation in the position occupied by mandrel 15a. For thispurpose, it is necessary that the turret structure be swingably mountedin order to permit a mandrel to pass the bedroll 13. An intermediateposition of a mandrel between the positions designated 15f and 15a isdesignated by the numeral lid. All of the foregoing is well establishedin the paper-producing art, and, in particular, is set forth in theabove-identified Patent No. 2,769,600. A full explanation of thesequence of operations as the turret is indexed can be found therein.

Each mandrel 15 is equipped with a pair of pulleys or sheaves 17 and 18,as can be best seen in F165. 5 and 6. Sheaves 17 and 18 are grooved forthe receipt of belts such as V-belts, and are identically positionedlongitudinally of each mandrel. Of the two sheaves provided on eachmandrel, one sheave, that designated 17, is fixed unrotatably to themandrel as by a setscrew 19, while the other sheave, that designated 18,is journaled on mandrel for rotational movement therewith, as by bearing20. In each adjacent mandrel, the chanacter of the seating of thesheaves 1'7 and 13 thereon is reversed. For example, in mandrels 115a,15c and 152, the rotatable sheave 18 is outboard, while in mandrels 15b,15d and 15;, the fixed sheave i7 is outboard. As will be describedhereinafter in greater detail, this arrangement permits two belts tocontact the sheaves on two adjacent mandrels simultaneously. One belthas a decreasing speed characteristic and is employed for driving themandrel during the web winding period from station 15 to 150 and untilthe mandrel at 15a has its rolls completely wound. The other belt, atthe time the first-mentioned belt has a decreasing speed characteristic,has an increasing speed characteristic and is employed for bringing. themandrel immediately behind the web-winding mandrel up to the properweb-engaging speed, the mandrel brought up to speed being designated bythe numeral 15 in FIG. 1. The travel of both belts can be seen in FIG.1, in which the belts 21 are seen contacting the sheaves on mandrels 15aand 151.

Each mandrel-driving belt 21, besides being entrained in the alignedsheaves 17 and 18 in adjacent mandrels, is entrained in a sheave 22 or22a which is part of a variable speed drive designated generally by thenumeral 23. A portion of this variable speed drive can be seen in FIG.4, wherein two sheaves are designated 22 and 22a and are employed forvarying the speed of belts 21. In addition, a number of belt-tensioningsheaves or pulleys are provided and are designated by the numerals 24,and 26 in PEG. 1, the sheaves 24 and 25 being pivotally mounted as at24a and 25a, respectively, while the sheave 26 is mounted in a pivotal,air cylinder loaded fashion to be described in greater detailhereinafter.

Referring now to FIG. 4, the sheave 2,2; is secured to a shaft 27journaled in bearings 28 and 28a mounted on baseplate 11a which may beprovided as part of frame 11. The sheave 22a (seen only in FIG. 4) issecured to shaft 27a which is journaled in bearings 29 and 29a. It willbe seen that the shaft 27 is positioned within the shaft 27a to provideboth pulleys 22 and 22a on one side of the drive 23. Each shaft 27 and27a is also equipped with a frusto-conical member 3t} and Biia securedin non-rotative relation thereto by means of suitable setscrews andkeys. The frusto-conical members 30 and 30a are oppositely oriented. Inthe illustration given, the larger ends are adjacent and eachfrusto-conical member 30 and 3th: is of considerable length in contrastto its change in diameter. Baseplate Illa also rotatably carries shaft32 coupled to an electric clutch coupling 31, the shaft 32 beingsuitably journaled in bearings 33 and 34, the shaft 32 being disposedparallel to the shafts Z7 and 27a carrying the frusto-conical members 30and 39a. Shaft 32 carries two frusto-conicai members 35 and 35a whichare identical to the frusto-conic-al members 3% and 3% mounted on shafts27 and 27a, the frusto-conical members 35 and 35:: carried by shaft 32being oppositely oriented to each other and to the frusto-conicalmembers 3% and 39a carried by shafts 27 and 27a. The shaft 32 isequipped with extensions going beyond the bearings 33 and 34, one forcoupling to a special drive generally designated 3-6 and the othercarrying a sheave 37. The sheave 37 is suitably powered through a belt37a (see now FIG. 1) from a sheave 37b mounted on drive shaft 370 of therewinder, drive shaft 370 being geared to bedroll 13 as at 37a.

Riding over the frusto-conical member 3%) and its radjacen-tfrusto-conical member 35, is a belt 33, which conples the rotativemotion of frusto-conical member 35 induced by sheave 37 tofrusto-conical member 30. As can be seen in FIG. 1, the belt 38 is alsoentrained over a sheave 39, two of which are provided, one for each belt33, as can be seen in PEG. 3. dual purpose in providing tension for thebelts 38 through The sheaves 39 serve a the action of springs 44) onlevers 4 3a fixed on shafts 43, and, by being movable in a directionparallel to the axis of shafts 32 and 27, provide for changing theposition of belts 3%}. For this purpose, the sheaves 39 are rotatablymounted on stub shafts 41 (best seen in PEG. 3), which in turn aresecured within arms 42 slidably carried on shafts 4-3. Shafts 43 arerotatably mounted in bearings 43a on base plate 11a.

By moving sheaves 39, the position of belts 33 can be changed and thusthe speed of frusto-conical members 30 and 3th: changed. For example, bymoving one sheave 39 outwardly (i.e., away from the common end ofoppositelyoriented members St? and 3%), the rotationai speed of themember 35) or Site, as the case may be, associated with the pulley 39 asmoved is increased. In FIG. 4, movement of the right-hand belt 38 to theright increases the speed of frusto-conical member Eda and itsassociated puliey 22a. Inward movement provides the reverse in speedchange. This occurs in the left-hand portion of the system, since thetwo pulleys 3? are connected together by means of a cable and springsystem generally designated %4 and in which the numeral 4-5 refers to acoiled spring connecting arm 42, as can be best seen in FIG. 3. Thus,movement to the right of the pulley 39' over which the right hand belt38 in FIG. 4 is entrained increases the rotational speed of theright-hand frusto-conical member Eda, while movement to the right of theleft-hand belt rovides an opposite change in speed in its associatedfrusto-conical member 39. As can be appreciated from what has gonebefore, the increase in speed of the righthand frusto-conical member 3%is employed to bring mandrel 15; up to web-engaging speed, while thedecrease in speed of the other frusto-conical member 30 is employed todecrease the speed of mandrel 15a during the course of a rewindingoperation.

To achieve movement of each pulley 39" and thereby change the speed ofthe two mandrels 15a and 157', speed variation control means areemployed which operate through the cable and spring system designated 44and which derives a signal from cams on and 47. Cams 46 and 47 aresecured to a shaft 43 (best seen in FIG. 3), which is suitably journaledin frame it as at 59 and 56. Also secured to shaft 48 is a sprocket 51which is suitably connected by intermediate chain 52:: to a sprocket 525on the main indexing shaft 52.

The main indexing shaft 52 (seen only in FIG. 1 and at the extreme upperright-hand corner thereof) is em ployed in rewinders to provide timingsignals for the indexing of turret 12. As in the Patent No. 2,769,600mentioned above, this indexing of turret can be achieved through aGeneva arrangement (not shown). In any event, one rotation of shaft 52produces, in the machine illustrated herein, a one-sixth rotation ofturret 12, thus bringing another mandrel into the web winding position.It will be appreciated that the residence time of a mandrel in the fixedposition in a given station does not extend for all the entire one-sixthrotation of shaft 52, but only for a fractional part thereof, it beingnecessary, for example, to have a mandrel remain in the stationidentified as the core-loading station and to which the numeral 15s isaflixed for only so long as it is necessary to mount an elongated corethereon. The remainder of the cycle of shaft 52 (corresponding to aone-sixth revolution of turret '12) is employed for bringing themandrels into a subsequent station, i.e., mandrel 15] being moveddownwardly and into engagement with bedroll I3, while mandrel 15a isbeing moved away from bedroll 1'3 and ultimately into the stationdesignated by the numeral 151) for removal of the wound roll.

The chain 520 connecting main indexing shaft 52 and shaft 48 whichcarries sprocket 51 is so arranged as to provide a two-to-one speedreduction, so that cams 46 and '47 make only one-half a revolution foreach complete revolution of the main indexing shaft 52. This providesfor cams 46, for example, to reduce the speed of mandrel- 15a duringwinding, and on the next cycle of main indexing shaft 5.2, for bringingthe speed of belt 21 to engage the sheave on mandrel 15:2 up to therequired value.

Pivotally mounted on frame 11 as at 53 (see FIG. 2) are cam followerarms 54 and 55, each of which is equipped with a cam follower rollerdesignated respectively 54a and 55a. Cam follower arm 54- is shown in aposition perpendicular to the control cable 56, and in this position theportion of the cam in contact with the cam follower roller 54a is aboutto initiate the beginning of a winding of a new roll, i.e., the point oftransfer. It is to be noted that the high point of the cam designated46a has already passed in contact with cam follower roller 54a, so thatthe point of transfer of web 14 to a new mandrel 15 occurs during therapid decrease in speed of the mandrel that is just coming into thewinding station. The movement of cam follower roller 54a in followingcam 46 is transmitted from cam follower arm 54 to the left-hand sheave39 in FIG. 3 by means of cable 56. Correspondingly, the motion of camfollower roller 55a derived from cam 47 is transmitted to the right-handsheave 39, as seen in FIG. 3, through cable 57. Each cable is suitablyentrained in sheaves 58 in order to change the direction thereof, andthe ends of cables 55 and 57 are secured to bolts 59 extending intosleeve portion 6% of the arms 42 which support the sheaves 39.

The ends of cables 56 and 57 which are secured to cam follower arms 54and 55' are equipped with turnbuckles 55a and 57a, respectively, forinitial positioning of sheaves 39 at the transfer point. The upper endof each cam follower arm 54 and 55 is equipped with an elongated slot54b and 55!) which extend transversely therethrough. Each slot 541) and551) carries a block designated Sdc and 55c, respectively, which ispositionable longitudinally of its associated slot by means of a controlknob 54d and 55d which is threadedly received within t3. threadedopening in the top of each cam follower arm 54 and 55. The ends ofturnbuckles Sda and 57b not secured to the associated cables 56 and 57are pinned to blocks 54c and 55c, respectively. Thus, by rotatingcontrol knobs 54d and 55d, the associated blocks 54c and 550 can bemoved upwardly or downwardly in slots 54b and 55b, as the case may be,and thus change the effective length of the cam follower arms 54 and 55.For example, by rotating control knob 54d clockwise and thus movingblock 540 upwardly, the length of cam follower arm 54 is effectivelyincreased, the length of cable 56 remaining constant, so that onmovement of the cam follower arm in a counterclockwise direction,greater travel of the associated sheave 39 is afforded from the samestarting point. The starting point corresponds to the transfer point ofthe web to the mandrel 15 just entering the web winding stationdesignated 15f, and at this point the rotational speed of the mandrelmust always be the same for any given web velocity. However, it isdesirable to be able to change the terminal speed, i.e., the speed ofmandrel 15a at the end of a web Winding operation. Where, for example, ahigher caliper (i.e., thickness) sheet is being run, it may be necessaryto have a lower terminal speed than that employed on a normal calipersheet in order to produce a roll of larger diameter. Conversely, withlower caliper sheets, the terminal speed may be required to be higher,producing a roll of smaller diameter. Both of these requisites can bemet in the foregoing apparatus merely by adjusting the blocks 54c and55c upwardly for a larger diameter roll or downwardly for a smallerdiameter roll than was previously being run.

The diameter can be changed independently of the paper caliper withinthe limits of paper or web strength, stretch, and softness. The diameterremains constant until manual adjustment of the terminal speed is made;changing the caliper of the web does not itself change the terminalspeed or diameter. Changing the diameter of the finished roll is at thediscretion of the operator, and may or may not be required to compensatefor sheet caliper changes, depending upon finished roll qualitystandards of the user of the machine.

It is believed that a brief description of the apparatus thus fardescribed will further aid in understanding the invention, thereforesuch a description follows.

Continuous Operation The apparatus is shown in a condition in which atransfer winding operation is about to take place. In FIG. 1, it can beseen that very slight counterclockwise movement of turret 12 will bringmandrel 15 near to bedroll 13. At this instant, a knife transverselysevers web 14 between mandrels 15 and 15a so that the glue-equippedsurface of the core on mandrel 15 picks up the leading edge of web 14for winding. Mandrel 15 is being driven through its sheave 17 by belt21, which is entrained over the sheave 39* shown in the left-handportion of FIG. 3 and which derives a continuous signal from cam as. Cam46 has been contoured to provide the change in speed necessary tomaintain a constant linear surface speed on mandrel 15 during theenlargement of the diameter of the roll being wound thereon. in theillustration given, cam 46 rotates counterclockwise, as can beappreciated from the arrow shown in FIG. 2, and gradually permits camfollower arm 54% to pivot counterclockwise about its pivotal mounting at53 on frame ill. This movement of cam follower arm 54 permits theleft-hand sheave 39 in FIG. 3 to move toward the right and to a positionwhich entrains a greater portion of belt 33 about the left-handfrusto-conical element Ed in FIG. 4.

Inasmuch as belt 38 is driven by frusto-conical member 35, which ismoving at a constant speed, the rightward movement of the left-hand belt3%; in FIG. 4 reduces the speed of the ieft-hand frusto-conical memberdd and thus the speed of its associated pulley 22. The pulley 22 carriesbelt 21 which provides the drive for mandrel 15 through its sheave 17.The same belt that is driving sheave 17 of mandrel 157 is also entrainedto the position previously occupied by mandrel lie but does not affectthe rotation of mandrel 15c inasmuch as the sheave 18 thereof isrotatably mounted thereon. The movement to the right of the left-handsheave 39 is brought about through the cooperation of spring 45 andcable 57 in cooperation with the movement of cable 56, since cable 57 isbeing drawn to the right in FIG. 2 under the influence of the clockwisemovement of cam follower arm 55 as seen in FIG. 2. The movement of cable57 moves the right-hand sheave 39 also toward the right in FIG. 3, whichchanges the position of its belt 38- to a position Where more of belt 38is wrapped about its associated frusto-conical member 35a and less aboutfrusto-conical member 3%. This means that the associated sheave 22;: hasan increasing speed characteristic. The belt 21 entrained over thissheave will be operating on sheave 1% of mandrel 15f and have no effectthereon. However, as mandrel 15c moves into the position occupied bymandrel 15f, the belt having the increasing speed characteristic willoperate against the sheave 17 of the next adjacent mandrel so as tobring that mandrel up to the proper webengaging speed.

Having thus described the usual or continuous operation of theapparatus, the special features of the equipment will now be describedand with particular reference to Power indexing Equipment.

Power Indexing Equipment Referring now to FIG. 4, the special drive 36will now be described. It will be seen that the shaft 32 at its lefthandend carries a sheave 61 which is releasably coupled to the shaft 32 bymeans of an overrunning cam clutch 62. The bed plate 11a also supports adown-time or auxiliary motor 63 which is equipped with a sheave 6dacting 7 as a companion for the sheave 6i. E-ntrained over the sheaves6i and 64 is a V-belt 65.

When the rewinder is operating as outlined above, the clutch 62 isdisengaged and the motor 63 is shut down. Likewise, the electric clutch311 is engaged so that the variable speed drive system 23 is driventhrough belt 37:: through sheave 37. When it becomes necessary to indexthe mandrels and where the main portion of the rewinder is shut down(the main drive shaft 370 being stopped), this can be advantageouslyachieved through disengaging the electric clutch 3i, engaging the camclutch 62, and activating the auxiliary motor 63. It will be appreciatedthat the main indexing shaft 52 may be operated independently of themain drive shaft 370 as by motor 520 (shown only fragmentarily in FIG.1), and this is employed for indexing the mandrels into proper position,as at the beginning of a winding operation of when it is necessary torepair the machine. The motor 52c operates through a belt drive 52d anda clutch pulley 52a to selectively rotate the shaft 52.

During this operation, the rotation of the main indexing shaft 52 causesmovement of the cam shaft %as through the chain 521;. Thus, as themandrels index, the earns 46 and 4'7 move the belts 38 along the variousconical members in accordance with the program established by thecontours of the cams i6 and 47.

Under such circumstances, the main drive shaft 370 of the rewinder isstopped. The gear connection G between shaft 37c and shaft 52 isrendered ineifective through the use of a clutch 52, coupled to indexingshaft drive gear 525;. When this occurs, there is no rotational movementof the cones 3%, Ella, 35 and 35a normally developed by belt 37a. Thisfurther means that the belts 38 would have to slide along stationarysurfaces, which would tend to destroy the frictional engagement of thebelts 38 with the various conical members 3% and 35. It will beappreciated that a predetermined amount of friction is essential so thatthe drive cones 35 and 35a will produce the right speed in the variousmandrels. The possibility of undue stressing of the belts 38 arises whenthe belts are shifted over stationary conical members. This is avoidedin the inventive construction through the employment of a special drivemotor 63 intermittently coupled to the shaft 32 for selective rotationof the drive cones 35 and 35a. When this intermittent character isestablished (as where the indexing shaft 52 is operated independently ofthe main drive shaft 37), the electric clutch 31 is simultaneouslydisengaged-this precluding the drive motor 63 attempting to drive theentire rewinder through the belt 37a.

it is further believed that a brief resume of the special operation justdescribed will be further helpful in understanding the invention, andtherefore the same is set down hereinafter under the heading PowerIndexing Operation.

Power Indexing Operation From time to time, it is found advantageous tospecially index the turret 12; independently of operation of theremainder of the rewinder. Ordinarily, it will be appreciated that themain indexing shaft 52 is responsive to the rotational movement of themain drive shaft 37c via gears 52 and 52g, and the faster the rewinderoperates, the faster the indexing must occur. When the main indexingshaft 52 is operated independently of the rewinder drive shaft 37c (asby motor 52c), there is power indexing. Although the main drive shaft37c is stopped and the indexing shaft 52 is separately powered, therotational motionof the indexing shaft 52 is still transmitted to thecam shaft 43 by means of the chain 52a. This results in programming ofthe cam systems involving earns 46 and The programming established bythe earns 46 and 47 results in the shifting of the belts 38 associatedwith the variable speed drive 23 over predetermined courses. During thisoperation, the auxiliary motor 63 is coupled to i 8 the drive shaft 32by means of a clutch and V-belt drive system including elements 61, 62,64 and 65. Thus, the various cone elements 3d, Etta, 35 and 35a willrotate to facilitate shifting of the belts 38 thereover. At the sametime, however, the electric clutch 31 is disengaged so that theauxiliary motor 63 is not then attempting to drive the rewinder throughthe V-belt drive system including sheaves 37 and 37b and belt 37a.

it will be apparent, however, that there is no interference with theprogram established by the cams 46 and 47, since the belts 38 willfollow through their predetermined courses. In this fashion, themandrels can be advanced utilizing the least amount of paperfor example,the mandrels can be indexed at a speed corresponding to 1500 feet perminute, while the paper coming to the mandrels is traveling only a fewhundred feet per minute. Power indexing, that is, rotation of the turretcarrying the mandrels 15 independently of any bedroll linkage, isadvantageous even when the bedroll is completely stopped. For example,this makes it possible to load cores on empty mandrels for thesubsequent receipt of paper. Also, after the machine has been down for atime, the glue on cores may be dried so that it is necessary tointroduce a newly-glued core into the transfer point mandrel. It is alsoadvantageous to utilize power indexing of the mandrels independently ofany bedroll operation so as to properly position a mandrel at thecorrect transfer point, thereby eliminating scrap.

The electrical circuitry for the auxiliary motor 63 can be seen in FIG.7, where a power source such as 440- volt, 60-cycle, three phase isdesignated by the symbol V. The circuit generally designated A in PEG. 7provides the current to a switch S. The switch S in turn energizes thestarter 63a for the auxiliary motor 63 and a relay 31a. The relay 31a isinterconnected with the clutch 31 to deenergize the same.

Also seen in FIG. 7 is the electrical circuitry associated with thepower indexing motor 52c. The starting circuitry for the motor 520 isessentially conventional. However, the pushbutton B also energizes arelay R; which is associated with an air control circuit to be describedhereinafter. The air control circuit is provided for tensioning thebelts 21, and the equipment for this purpose will be described belowunder the heading Belt Tensioning Equipment.

Belt T ensioning Equipment Referring now to FIG. 1 and in particular tothe idler pulley 26, it will be seen that this pulley is rotatablymounted on a transverse shaft 66. The shaft 66, in turn, is carried by abracket member 67 which is pivotally mounted on the frame 11 as at 68.Provided on the frame 11 as by a pivotal mounting at 70, is an aircylinder 71. The piston rod 72 of the cylinder 71 is pivotally connectedto the bracket 67 as at 73. It will be seen that extension of the pistonrod 72 pivots the bracket 67 to tension the belt 21. Two such assembliesare provided, one for each belt 21.

Reference to PEG. 9 shows the two cylinders employed for tensioning thebelts 21, the cylinders being designated 71 and 71a. Each cylinder isequipped with an arr line 74 and 740, respectively, which suppliespressurized fluid to one end of the cylinder-the end tending to extendthe associated piston rod. The operation involved here contemplates thatthe cylinders 71 and 71a will always be under pressure, but that thevalue of the pressure will be varied so as to achieve relaxation of thebelt tension or increase thereof, as desired. For this purpose, a sourceof compressed air 75 is provided, coupled by suitable piping to a highpressure regulator '76 and a low pressure regulator 77. Conduits fromboth regulators 76 and 77 communicate with three-way valve 78 and 73aassociated, respectively, with cylinders 9 71 and 71a. Each of thevalves '78 and 78a is equipped with a solenoid actuator '79 and 7%,respectively.

in the condition seen in FIG. 9, the solenoids 7 and 9a are energizedand position the valves '78 and 78a to silver high pressure air to thecylinders 71 and 71a. This results in maximum tensioning of the belt,which is c .cterisic of th ordinary or continuous operation of therewinder.

During power indexing, as described above, it is advantageous to relaxthe tension on the belt 21, especially if paper is being Thus, theprevired to the mandrels. ously-rnentioned relay R is provided, therelay R being 've to open the contacts C of HS. 8. In FIG. 8, the wiringdiagram associated with the solenoid valves 79 79a is shown, power forthe valves coming from a source V in ordinary Operation, the contact Cas well as contacts C an C are closed, so that the solenoids '79 and 7%are energized and the cylinders 71 and 71a communicated with highpressure regulator 76 (see PEG. 9). However, when the pushbutton B (see1G. 7) is pushed, both solenoids are deenergizcd and the valves 73 and78a are switched from the position shown in FIG. 9 so as to communicatewith the low pressure reg ator W. This is the condition of the systemduring power ind Reduction of the tension or the belts 21 allows aslight page in the belt system so that the mandrel or mandrcls contactedby the belts are operated at wer speeds than they would it fullfrictional contact Were present. The degree of relaxation of belts 2 1is only such as e nit the web speed to control the rotational speed ofthe mandrel in the web winding station. In other words, the incrementaltorque on the mandrel urging it to a faster speed is not as great as thesheet strength. For any given machinewherein sheets of substantiallysimilar strengths are being wound from day to day--a single setting ofthe low pressure regulator 77 will sufiice.

The tensioning apparatus can be used advantageously aside and apart fromower indexing, as, for example, when -andrel 35a in the web windingstation is winding a log T at becomes oversized as would result fromwedded panel, and the like. Reference to FIG. 8 shows the electric" ciruitry for achieving selective relaxation of the t tension. in FIG. 8,there is provided a pushbutton E which can be actuated by the machine onor r upon the appeared-ice of a wad, or the like, and this results inthe energization of relay R The relay R upon energi tion opens thenormally closed contacts C C t on persisting until the switch S isopened by cut-oil knife (not sh wn), which indicates the completionwinding of a roll on given mandrel. be seen that current is stillprovided to of the solenoids 79 and by wrote of a switch S ich can alsobe seen in EEG. 3. The switch S is actasted a earn 3 fixed to the shaft452, which also carries the progr mining cams El.

Adva eously, the is clamped to the shaft rews so that it can be adjustedinto correct ti ion with the program cams 4'7 and $1. This p c selectorswitch to change its selection of solenoid valves T9 or at the transferof the web to a new mandrel. Also the cam is preferably split into twodiscs so the duration of the cycle that the selector r holds each set ofcontacts closed, can be accurately adjusted. operation of the tensioningsystem relative to m rel operation on an oversized log is describedbelow r the heading Too Large Log Operation.

Too Large Log Operation ma-lly closed contacts C and C so that the camand selector limit switch S can control the flow of electrical power towhichever of the solenoid air-operated control valves is associated withthe mandrel immediately adjacent the Web winding station. in otherwords, the belt will be tensioned on the mandrel coming up to speed andapproaching the web winding station, while the belt on the mattdrel inthe web winding station is under slack tension. ln H6. 8, the mandrel inthe web winding station would be associated with valve 7?.

The cam and selector switch S coordinate with the procams as and 47 todeenergize the control valve "79 which controls the air supply .to theair cylinder ii-this cylinder controlling the tension in that mandreldrive belt which is driving the mandrel 15a (the mandrel which isreceiving the web being wound at the time when the operator presses thetoo large log pushbutton B This supplies low pressure air to thecylinder 71 and reduces the tension in the associated mandrel drive belt21 to permit friction unwinding instead of metered winding, the othermandrel drive belt being maintained at full metered winding tension.

The transfer of the cut-off limit switch S interrupts the too large logoperation by decnergizing relay R and returns the unit to normal runningconditions with high pressure air supplied to both mandrel belt tensionair cylindersrendering the cam and selector limit switch inoperative.Thus, the operator may again press the too large log pushbutton B if heWishes, but there is no Way for him to signal the machine not to returnto normal conditions at cut-0E.

While, in the foregoing specification, a detailed description of anembodiment of the invention has been given for purpose of explanation,it will be readily appreciated by those skilled in the that the detailsherein may be varied widely without departing from the spirit and scopeof the invention.

I claim:

l. ln web winding apparatus for the cyclic winding of webs, a frame, aneven numbered plurality of mandrels rnovably, rotatably mounted on saidframe, each of said mandrels being equipped at the same longitudinalpositions with a pair or" pulleys, one of said pair of pulleys beingfixed to said n1 ridrel and the other rotatable thereon, the positionsof said one and said other pulley being reversed in adjacent mandrels,drive means simultaneously engag able with two adjacent mandrels, s iddrive means comprising a pair of belts entrained in the pulleys of saidtwo adjacent inandrels, a mechanical variable speed drive 0pcrative toprovide one belt with an increasing speed characteristic while providingthe other belt with a decreasing speed characteristic, a bedrollrotatably mounted on said frame adiacent the belt-engaged mandrels,means for rotating said bedrol-l, means for indexing said mandrels, saidindexing means normally being coupled to and responsive to saidbedroll-rotating means, and means for indexing said mandrelsindependently of said bedrol -rotating means.

2. in web winding apparatus for the cyclic winding of webs, a frame, oneven numbered plurality of mandrels mo /ably, rotatably mounted on saidframe, each of said mandrels being equipped at the same longitudinalpositions with a pair of pulleys, one of said pair of pulleys beingfixed to said mandrel and the other rotatable thereon, the positions ofsaid one and other pulley being reversed in adjacent mandrels, drivemeans simultaneously engageable with two adjacent mandrels, said drivemeans comprising a pair or" belts entrained in the pulleys of said twoadjacent mandre-ls, a mechanical variable speed drive operative toprovide one belt with an increasing speed characteristic while providingthe other belt with a decreasing speed characteristic, Ia bedrollrotatably mounted on said frame adjacent the belt-engaged mandrels,means for rotating said bedroll, means for indexing said mandrels, saidindexing means normally being coupled to and responsive to saidbedroll-rotating means, means for inexing said mandrels independently ofsaid bedroll-rotating means, said variable speed drive being releasablycoupled to said bedroll-rotating means and deriving power therefrom,said variable speed drive being coupled to said mandreldndexing meansand being responsive thereto, means for powering said variable speeddrive independent of said bedroll-rotating means, and means foruncoupling said variable speed drive and bedroll-rotating meansresponsive to the powering of said variable speed drive by saidindependent powering means.

3. In web winding apparatus for the cyclic winding of webs, a frame, aneven numbered plurality of mandrels movably, rotatably mounted on saidframe, each of said mandrels being equipped at the same longitudinalpositions with a pair of pulleys, one of said pair of pulleys beingfixed to said mandrel and the other rotatable thereon, the positions ofsaid one and said other pulley being reversed in adjacent mandrels,drive means simultaneously engageable with two adjacent mandrels, saiddrive means comprising a pair of belts entrained in the pulleys of saidtwo adjacent mandrels, a mechanical variable speed drive operative toprovide one belt with an increasing speed characteristic while providingthe other belt with a decreasing speed characteristic, a bedrollrotatably mounted on said frame adjacent the beltengaged mandrels, meansfor rotating said bedroll, means for indexing said mandrels, saidvariable speed drive being equipped with a pair of programming camsadapted to vary the speed of said belt-engaged mandrels, means couplingsaid variable speed drive with said bedrollrotating means fortransmitting power to said drive, means for selectively uncoupling saidbedroll-rotating means and said drive, and means for transmitting powerto said drive responsive to the means for selectively uncoupling saidbedroll-rotating means and drive.

4. In web Winding apparatus, a frame, a mandrelsupporting turretrotatably mounted on said frame and operative to position each mandrelin a Web winding station, an even number of mandrels rotatably carriedby said turret, each of said mandrels carrying a pair of pulleys ataligned positions along the length thereof, one of each pair of pulleysbeing fixed with the other rotatable With respect to the associatedmandrel, corresponding pulleys in alternate mandrels being fixed and theremaining corresponding pulleys being rotatable, a pair of beltsentrained in the pulleys of two adjacent mandrels, a pair of variablespeed drives for said belts, one of said drives increasing the speed ofits associated belt while the other of said drives decreases the speedof its associated belt, means for controlling said drives, saidcontrolling means being operative to cause the fixed pulley on a mandrelpositioned in a web winding station to be coupled to the belt having adecreasing speed characteristic, each of said variable speed drivesincluding a conical member rotatably mounted on said frame and having adriving pulley axially secured thereto in which the said associated beltis entrained, separate powered belt means for each of said memberspositionable along the length thereof and transmitting motion to theconical surface thereof, the conical member associated with one beltbeing oppositely oriented from the conical member associated with theother of said belts, the said separate powered belt means beingentrained over sheaves on said frame for movement parallel to the axesof said conical members, said sheaves being so interrelated thatmovement in one sheave is accompanied by corresponding movement in theother, a bedroll rotatably mounted on said frame adjacent thebelt-engaging mandrels, means for rotating said bedroll, means couplingsaid variable speed drives with said bedroll-rotating means fortransmitting power to said drives, means for selectively uncoupling saidbedroll means and said drives, and means for transmitting power to saiddrives responsive to the means for selectively uncoupling saidbedroll-rotating means and drives.

5. In web winding apparatus, a frame, a mandrelsupporting turretrotatably mounted on said frame and operative to position each mandrelin a web winding station, an even number of mandrels rotatably carriedby said turret, each of said mandrels carrying a pair of pulleys ataligned positions along the length thereof, one of each pair of pulleysbeing fixed with the other rotatable with respect to the associatedmandrel, corresponding pulleys in alternate mandrels being fixed and theremaining corresponding pulleys being rotatable, a pair of beltsentrained in the pulleys of two adjacent mandrels, a pair of variablespeed drives for said belts, one of said drives increasing the speed ofits associated belt while the other of said drives decreases the speedof its associated belt, means for controlling said drives, saidcontrolling means being operative to cause the fixed pulley on a mandrelpositioned in a web winding station to be coupled to the belt having adecreasing speed characteristic, each of said variable speed drivesincluding a conical member rotatably mounted on said frame and having adriving pulley axially secured thereto in which the said associated beltis entrained, separate powered belt means for each of said memberspositionable along the length thereof and transmitting motion to theconical surface thereof, the conical member associated with one beltbeing oppositely oriented from the conical member associated with theother of said belts, the said separate powered belt means beingentrained over sheaves on said frame for movement parallel to the axesof said conical members, said sheaves being so interrelated thatmovement in one sheave is accompanied by corresponding movement in theother, a bedroll rotatably mounted on said frame adjacent thebelt-engaging mandrels, means for rotating said bedroll, means couplingsaid variable speed drives with said bedroll-rotating means fortransmitting power to said drives, means for selectively uncoupling saidbedroll means and said drives, means for transmitting power to saiddrives responsive to the means for selectively uncoupling saidbedroll-rotating means and drives, each of said sheaves being coupled bycable means to a cam follower arm pivotally mounted on said frame, andseparate identical cams associated with each arm, the cam associatedwith one arm being reversely oriented to the cam associated with theother arm, means on said frame for indexing said mandrels, meanscoupling said cams with said indexing means for rotating said cams instep with the said indexing means, and means for releasably couplingsaid indexing means with said bedrollrotating means.

In web winding apparatus, a frame, a bedroll rotatably mounted on saidframe, an even-numbered plurality of mandrels movably, rotatably mountedon said frame, a variable speed drive for said mandrels adapted to drivesaid mandrels independently of the tension of a web being wound thereon,means on said frame for indexing said mandrels, means for rotating saidbedroll, means releasably coupling said indexing means and the means forrotating said bedroll, said drive comprising two pairs of cones mountedfor rotation in said frame with the axes of the cones in each pair beingdisposed in parallel relation with the cones of each pair beingoppositely oriented, belt means supported on each pair of cones, means"on said frame for moving each of said belt means axially of said conesin a predetermined cyclic fashion, said beltmoving means including asheave movably supported on said frame for each of said belt means, cammeans on said frame, means connecting said cam means with said indexingmeans, means connecting said sheaves with said cam means, saidconnecting means being adjustable to provide a variation in the terminalspeed of the drive at the end of a winding cycle without affecting theinitial speed at the beginning of a winding cycle, means on said framecoupling said bedroll-rotating means and one frame a of each pair ofcones for rotating said one frame of each pair of cones, clutch means inthe means connecting said bedroll-rotating means and said cones fordisengaging said cones from said bedroll-rotating means, belt meanscoupling the other cone of each pair of cones sequentially with pairs ofadjacent mandrels, each mandrel being equipped with a pair of pulleysfor entrainment of said belts, one of said pulleys being rotatablymounted while the other pulley is fixed to said mandrel, the positionsof said pulleys being reversed in adjacent mandrels, and motor means onsaid frame for rotating said one of each pair of cones responsive tosaid clutch means.

7. In web winding apparatus for the cyclic winding of webs, a frame, aneven numbered plurality of mandrels movably, rotatably mounted on saidframe, each of said mandrels being equipped at the same longitudinalpositions with a pair of pulleys, one of said pair of pulleys beingfixed to said mandrel and the other rotatable thereon, the positions ofsaid one and said other pulley being reversed in adjacent mandrels,drive means simultaneously engageable with two adjacent mandrels, saiddrive means comprising a pair of belts entrained in the pulleys of saidtwo adjacent mandrels, a mechanical variable speed drive operative toprovide one beltwith an increasing speed characteristic while providingthe other belt with a decreasing speed characteristic, a bedrollrotatably mounted on said frame adjacent the belt-engaged mandrels,means for rotating said bedroll, means for indexing said mandrels, saidindexing means normally being coupled to and responsive to saidbedroll-rotating means, means for indexing said mandrels independentlyof said bedroll-rotating means, means releasably coupling said variablespeed drive to said bedroll-rotating means, means for powering saidvariable speed drive responsive to the uncoupling of said releasablycoupling means, and means for adjusting the tension of said belts topermit the web speed to control the mandrel speed on which the web isbeing wound.

8. The structure of claim 7 in which said tension adjusting meanscomprises a pressure fluid cylinder for each belt, a tensioning pulleyrotatably movably mounted on said frame for each belt and having a beltentrained therein said cylinder and tensioning pulley being operativelyconnected to tension the belt entrained therein, and means for varyingthe fluid pressure in said cylinder.

9. The structure of claim 7 in which said tension adjusting meansincludes means responsive to means for indexing said mandrelsindependently, whereby the belt tension is relaxed during independentindexing.

10. In web winding apparatus, a frame, a mandrelsupporting turretrotatably mounted on said frame operative to sequentially position eachmandrel in a web winding station, an even number of mandrels rotatablycarried by said turret, each of said mandrels carrying a pair of pulleysat aligned positions along the length thereof, one of each pair ofpulleys being fixed with the other rotatably with respect to theassociated mandrel, corresponding pulleys on alternate mandrels beingfixed and the remaining corresponding pulleys being rotatable, a pair ofendless belts entrained in the pulleys of two adjacent mandrels, a pairof variable speed drives for said belts, one of said drives increasingthe speed of its associated belt while the other of said drivesdecreases the speed of its associated belt, means for controlling saiddrives, said controlling means being operative to cause the fixed pulleyon a mandrel positioned in a web winding station to be coupled to thebelt having a decreasing speed characteristic, a bedroll rotatablymounted on said frame adjacent the belt-engaged mandrels, means forrotating said bedroll, means for indexing said mandrels, said indexingmeans normally being coupled to and responsive to said bedroll-rotatingmeans, and means for indexing said mandrels independently of saidbedrollrotating means.

11. The structure of claim 10 in which means are provided on said framefor relieving the tension of said belts to produce slippage between saidbelts and pulleys.

12. In web winding apparatus, a frame, a mandrelsupporting turretrotatably mounted on said frame operative to sequentially position eachmandrel in a web winding station an even number of mandrels rotatablycarried by said turret, each of said mandrels carrying a pair of pulleysat aligned positions along the length thereof, one of each pair ofpulleys being fixed with the other rotatable with respect to theassociated mandrel, corresponding pulleys on alternate mandrels beingfixed and the remaining corresponding pulleys being rotatable, a pair ofendless belts entrained in the pulleys of two adjacent mandrels, a pairof variable speed drives for said belts, one of said drives increasingthe speed of its associated belt while the other of said drivesdecreases the speed of its associated belt, means for controlling saiddrives, said controlling means being operative to cause the fixed pulleyon a mandrel positioned in a web winding station to be coupled to thebelt having a decreasing speed characteristic, a bedroll rotatablymounted on said frame adjacent the belt-engaged mandrels, means forrotating said bedroll, means for indexing said mandrels, said indexingmeans normally being coupled to and responsive to said bedroll-rotatingmeans, means for indexing said mandrels independently of saidbedroll-rotating means, said variable speed drives being releasablycoupled to said bedroll-rotating means and deriving power therefrom,said variable speed drives being coupled to said mandrel-indexing meansand being responsive thereto, means for powering said variable speeddrives independent of said bedroll-rotating means, and means foruncoupling said variable speed drives and said bedrollrotating meansresponsive to the powering of said variable speed drives by saidindependent powering means.

13. In web Winding apparatus, a frame, a mandrelsupporting turretrotatably mounted on said frame operative to sequentially position eachmandrel in a web winding station, an even number of mandrels rotatablycarried by said turret, each of said mandrels carrying a pair of pulleysat aligned positions along the length thereof, one of each pair ofpulleys being fixed with the other rotatable with respect to theassociated mandrel, correspending pulleys on alternate mandrels beingfixed and the remaining corresponding pulleys being rotatable, a pair ofendless belts entrained in the pulleys of two adja cent mandrels, a pairof variable speed drives for said belts, one of said drives increasingthe speed of its associated belt while the other of said drivesdecreases the speed of its associated belt, means for controlling saiddrives, said controlling means being operative to cause the fixed pulleyon a mandrel positioned in web winding station to be coupled to the belthaving a decreasing speed characteristie, a bedroll rotatably mounted onsaid frame adjacent the belt-engaged mandrel, means for rotating saidbedroll, means for indexing said mandrels, said indexing means normallybeing coupled to and responsive to said bedrollrotating means, means forindexing said mandrels inde pendently of said bedroll-rotating means,means releasably coupling said variable speed drives to saidbedrollro-tating means, means for powering said variable speed drivesresponsive to the uncoupling of said releasable coupling means, andmeans for adjusting the tension of said belts to permit the web speed tocontrol the speed of the mandrel on which the web is being wound.

14. In web winding apparatus, a frame, a mandrelsupporting turretrotatably mounted on said frame operative to sequentially position eachmandrel in a web winding station, an even number of mandrels rotatablycarried by said turret, each of said mandrels carrying a pair of pulleysat aligned positions along the length thereof, one of each pair ofpulleys being fixed, with the other rotatable with respect to theassociated mandrel, corresponding pulleys on alternate mandrels beingfixed and the remain ing corresponding pulleys being rotatable, a pairof endless belts entrained in the pulleys of two adjacent mandrels, apair of variable speed drives for said belts, one

of said drives increasing the speed of its associated belt While theother of said drives decreases the speed of its associated belt, meansfor controlling said drives, said controlling means being operative tocause the fixed pulley on a mandrel positioned in a web winding stationto be coupled to the belt having a decreasing speed characteristic, abedroll rotatably mounted in said frame adjacent the belt-engagedmandrels, means for rotating said bedroll, programming means coupled tosaid variable speed drives for controlling the speed of saidbelt-engaged mandrels, means on said frame for adjusting the tension ofsaid belts to produce slippage between said belts and the puileys onsaid belt-engaged mandrels, switch means coupled to saidtension-adjusting means for actuating said tension-adjusting means forproducing said slippage, and means responsive to said programming meansand coupled to said tension-adjusting means for eliminating saidslippage, whereby said apparatus can be selectively operated fortension-controlled winding of a given mandrel.

15. n web winding apparatus, a frame, a mandrel-supporting turretrotatabl mounted on said frame operative to sequentially position eachmandrel in a web winding station, an even number of mandrels rotatablycarried by said turret, each of said mandrcls carrying a pair of pulleysat aligned positions along the length thereof, one of each pair ofpulleys being fixed, with the other rotatable with respect to theassociated mandrel, corresponding pulleys 15 on alternate mandrels beingfixed and the remaining corresponding pulleys being rotatable, a pair ofendless belts entrained in the pulleys of two adjacent mandrels, a pairof variable speed drives for said belts, one of said drives increasingthe speed of its associated belt while the other of said drivesdecreases the speed of its associated belt,

means for controlling said drives, said controlling means beingoperative to cause the fixed pulley on a mandrel positioned in a webwinding station to be coupled to the belt having a decreasing speedcharacteristic, said controlling means including programming meanscoupled to a mandrel in the web winding station for decreasing the speedthereof at a predetermined rate, electrical means including a switch foruncoupling said programming means from said :web Winding stationmandrel, and means responsive to said programming means for recouplingsaid programming means to said web winding station mandrel at the end ofa web winding cycle whereby actuation of said switch is operative toprovide tension-controlled winding for only the remaining portion of thewinding cycle in which said web winding station mandrel is engaged.

References Cited in the file of this patent UNITED STATES PATENTS

1. IN WEB WINDING APPARATUS FOR THE CYCLIC WINDING OF WEBS, A FRAME, ANEVEN NUMBERED PLURALITY OF MANDRELS MOVABLY, ROTATABLY MOUNTED ON SAIDFRAME, EACH OF SAID MANDRELS BEING EQUIPPED AT THE SAME LONGITUDINALPOSITIONS WITH A PAIR OF PULLEYS, ONE OF SAID PAIR OF PULLEYS BEINGFIXED TO SAID MANDREL AND THE OTHER ROTATABLE THEREON, THE POSITIONS OFSAID ONE AND SAID OTHER PULLEY BEING REVERSED IN ADJACENT MANDRELS,DRIVE MEANS SIMULTANEOUSLY ENGAGEABLE WITH TWO ADJACENT MANDRELS, SAIDDRIVE MEANS COMPRISING A PAIR OF BELTS ENTRAINED IN THE PULLEYS OF SAIDTWO ADJACENT MANDRELS, A MECHANICAL VARIABLE SPEED DRIVE OPERATIVE TOPROVIDE ONE BELT WITH AN INCREASING SPEED CHARACTERISTIC WHILE PROVIDINGTHE OTHER BELT WITH A DECREASING SPEED CHARACTERISTIC, A BEDROLLROTATABLY MOUNTED ON SAID FRAME ADJACENT THE BELT-ENGAGED MANDRELS,MEANS FOR ROTATING SAID BEDROLL, MEANS FOR INDEXING SAID MANDRELS, SAIDINDEXING MEANS NORMALLY BEING COUPLED TO AND RESPONSIVE